Spin Pole
I have a spin pole on my Cat 27, and use it both for the traditional spin run, as well as to wing out the jib in "whisker pole" fashion. The spin pole is long enough that it will act as a whisker pole for the smaller jibs (up to about 120) if you're going DDW, which I usually am. As mentioned, you couldn't use a whisker pole as a spin pole, as the tubing on all the whisker poles I've seen aren't a large enough cross section to be strong enough to handle the shear or compression load of a spin.